package com.itheima.homework;

public class Demo4 {
    public static void main(String[] args) {
        int[] arr = {};
        String s =arrToString(arr);
        System.out.println(s);
    }
    public static String arrToString(int[] arr){
        StringBuilder sb = new StringBuilder("[");
        for (int i = 0; i < arr.length; i++) {
            if(i == arr.length - 1){

                sb.append(arr[i]);
            }else {
                sb.append(arr[i]).append(",");
            }
        }
        sb.append(']');


        return sb.toString();
    }
}
